Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
908
FNUS55 KRIW 191857
FWFRIW
Fire Weather Planning Forecast for Western and Central Wyoming
National Weather Service Riverton WY
1257 PM MDT Wed Aug 19 2026
.DISCUSSION...
...Yellowstone NP and Teton dispatch areas (includes fire weather
zones 140...414...415...and 416)...
Drier and warmer weather is expected to prevail across much of the
dispatch area today and Thursday. Precipitation chances will be
zero if not near zero for the next few days. Minimum relative
humidity values will be around 20-25 percent through Friday. Good
recovery is forecast overnight across the higher elevations while
poor recovery is expected for the lower elevations. Winds remain
around 10 mph through the rest of the afternoon with occasional
gusts of 15 to 20 mph. Light winds are expected overnight with
similar winds returning for the afternoon and evening Thursday.
...Cody dispatch area (includes fire weather zones 275...276...
282...283...285...286...287...288...and 289)...
Drier and warmer weather is expected to prevail across much of the
dispatch area today and Thursday. Precipitation chances will be
zero if not near zero for the next few days. Minimum relative
humidity values will be around 20-25 percent through Friday. Good
recovery is forecast overnight across the higher elevations while
poor recovery is expected for the lower elevations. Winds remain
around 10 mph through the rest of the afternoon with occasional
gusts of 15 to 20 mph. Light winds are expected overnight with
similar winds returning for the afternoon and evening Thursday.
...Casper dispatch area (includes fire weather zones 277...278...
279...280...281...285...289...and 300)...
Drier and warmer weather is expected to prevail across much of the
dispatch area today and Thursday. Precipitation chances will be
zero if not near zero for the next few days. A very isolated virga
shower or two cannot be ruled out across far southwestern portions
of zones 277 and 279 on Thursday. Minimum relative humidity
values will be around 20-25 percent through Friday. Good recovery
is forecast overnight across the higher elevations while poor
recovery is expected for the lower elevations. Winds remain around
10 mph through the rest of the afternoon with occasional gusts of
15 to 20 mph. Stronger wind gusts of 25 to 30 mph cannot be ruled
out across portions of zones 277, 278, and 279. Light winds are
expected overnight with similar winds returning for the afternoon
and evening Thursday.
...Thunderstorms imply strong gusty and erratic winds...
WYZ280-202100-
Natrona County/Casper BLM-
Including the cities of Casper and Midwest
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......7 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......17 percent drier.
20-foot winds.......Northwest winds around 15 mph with higher
gusts.
Ridge top winds.....Northwest around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph.
Mixing Height.......9000-10400 ft agl.
Smoke dispersal.....Very good to excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....56-61.
24 hr trend......4 degrees warmer.
Max humidity........48-54 percent.
24 hr trend......31 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph until 2400, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....85-90.
24 hr trend......5 degrees warmer.
Min humidity........11-17 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then
southwest around 10 mph until 1500, then
northwest. Gusts up to 20 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor until 1200, then very good to excellent.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......2 degrees warmer.
Max humidity........40-46 percent.
24 hr trend......8 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph and gusty until 2100,
then downslope/downvalley 4-7 mph.
Ridge top winds.....North around 10 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 2400, then southeast.
Mixing Height.......4600-6600 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....89-94.
24 hr trend......4 degrees warmer.
Min humidity........14-20 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
around 10 mph with gusts to around 25 mph until
1500, then north with gusts to around 25 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then
northwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then
northwest.
Mixing Height.......2800-4800 ft agl until 1200, then 10000-12000
ft agl.
Smoke dispersal.....Poor to fair until 1200, then excellent.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the lower 60s. Northeast
winds around 10 mph.
.SATURDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the lower 60s. Highs in the upper 80s.
South winds around 10 mph.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the upper 80s.
West winds around 10 mph.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 50s. Highs in the mid 80s. West
winds around 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
.WEDNESDAY...Mostly sunny. Highs in the upper 80s.
$$
WYZ283-202100-
Upper Wind River Basin/Wind River Basin-
Including the cities of Crowheart, Lander, Riverton, and Shoshoni
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......11 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......19 percent drier.
20-foot winds.......North winds around 10 mph with gusts to around
25 mph.
Ridge top winds.....North around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......8800-9600 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....54-59.
24 hr trend......5 degrees warmer.
Max humidity........45-51 percent.
24 hr trend......35 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph until 2400, then
northwest until 0300, then downslope/downvalley
4-7 mph. Gusts up to 20 mph.
Ridge top winds.....North around 15 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 2400, then west.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......4 degrees warmer.
Min humidity........17-23 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northwest around 10 mph with higher gusts.
Ridge top winds.....West around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......600-2600 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....56-61.
24 hr trend......2 degrees warmer.
Max humidity........47-53 percent.
24 hr trend......2 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph until 2400, then
southwest around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....North around 10 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 2400, then southwest.
Mixing Height.......4200-6200 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Slight chance of showers and thunderstorms in
the afternoon. Chance of precipitation 20
percent.
Chance of thunder...0 percent.
Max temperature.....85-90.
24 hr trend......2 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then north
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 7600-9600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the lower 60s. Winds
generally less than 10 mph.
.SATURDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 56 to 61. Highs 83 to 88. West
winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs in the
mid 80s.
$$
WYZ285-202100-
South Bighorn Mountains-
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....74-79.
24 hr trend......5 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......15 percent drier.
20-foot winds.......Northwest winds around 15 mph with gusts to
around 25 mph.
Ridge top winds.....Northwest around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph.
Mixing Height.......7200-8400 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Clear.
Chance of thunder...0 percent.
Min temperature.....56-61.
24 hr trend......6 degrees warmer.
Max humidity........38-44 percent.
24 hr trend......35 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph until 0300, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 10 to 15 mph.
Mixing Height.......2600-4600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......5 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west
around 10 mph with gusts to around 25 mph until
1500, then northwest with gusts to around 25
mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......2000-4000 ft agl until 1200, then 7200-9200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......3 degrees warmer.
Max humidity........33-39 percent.
24 hr trend......6 percent drier.
Humidity recovery...Poor.
20-foot winds.......Northeast winds around 10 mph and gusty until
2400, then downslope/downvalley 4-7 mph.
Ridge top winds.....Northeast around 15 mph until 2400, then east.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 15 mph until 2400, then
southeast.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....82-87.
24 hr trend......3 degrees warmer.
Min humidity........17-23 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West around 10 mph until 1200, then northwest.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 1200, then northwest.
Mixing Height.......2800-4800 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the lower 60s. Northeast
winds around 10 mph.
.SATURDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 57 to 62. Highs 78 to 83. West
winds around 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the upper 70s.
.WEDNESDAY...Mostly sunny. Highs around 80.
$$
WYZ281-202100-
Johnson County/Casper BLM-
Including the cities of Buffalo and Kaycee
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....76-81.
24 hr trend......2 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......4 percent drier.
20-foot winds.......North winds around 10 mph with higher gusts.
Ridge top winds.....North around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......9400-10600 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......5 degrees warmer.
Max humidity........52-58 percent.
24 hr trend......34 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....North around 10 mph until 2400, then west.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 2400, then west.
Mixing Height.......3800-5800 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....82-87.
24 hr trend......6 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then north
around 10 mph with higher gusts.
Ridge top winds.....South around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west.
Mixing Height.......1600-3600 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......1 degree warmer.
Max humidity........42-48 percent.
24 hr trend......2 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph and gusty until 2100,
then downslope/downvalley 4-7 mph.
Ridge top winds.....North around 10 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....North around 15 mph until 2400, then south.
Mixing Height.......4000-6000 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......2 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then north
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then
northwest.
Mixing Height.......2200-4200 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the lower 60s. North winds
around 10 mph.
.SATURDAY THROUGH SUNDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 59 to 64. Highs in the upper 80s.
West winds around 10 mph.
.MONDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
.WEDNESDAY...Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 80s.
$$
WYZ282-202100-
South Bighorn Basin/Worland BLM-
Including the cities of Ten Sleep, Thermopolis, and Worland
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....76-81.
24 hr trend......4 degrees warmer.
Min humidity........18-24 percent.
24 hr trend......9 percent drier.
20-foot winds.......North winds around 10 mph with higher gusts.
Ridge top winds.....North around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......7400-8200 ft agl.
Smoke dispersal.....Good to very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....55-60.
24 hr trend......5 degrees warmer.
Max humidity........44-50 percent.
24 hr trend......39 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northeast winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northeast around 10 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 2400, then south.
Mixing Height.......2800-4800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor to fair until 2400, then poor.
.THURSDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....81-86.
24 hr trend......5 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northeast around 10 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then northwest.
Mixing Height.......1000-3000 ft agl until 1200, then 6000-8000 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......1 degree warmer.
Max humidity........37-43 percent.
24 hr trend......1 percent drier.
Humidity recovery...Poor.
20-foot winds.......Northeast winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northeast around 10 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 2400, then south.
Mixing Height.......3200-5200 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Poor to fair until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......2 degrees warmer.
Min humidity........17-23 percent.
24 hr trend......3 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then north
around 10 mph with higher gusts.
Ridge top winds.....Southwest around 10 mph until 1200, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then
northwest.
Mixing Height.......1200-3200 ft agl until 1200, then 6600-8600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the mid 60s. Winds
generally less than 10 mph.
.SATURDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 58 to 63. Highs 85 to 90. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
.WEDNESDAY...Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 80s.
$$
WYZ275-202100-
North Bighorn Basin/Worland BLM-
Including the cities of Greybull, Lovell, and Powell
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......3 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......9 percent drier.
20-foot winds.......North winds around 10 mph and gusty.
Ridge top winds.....North around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......7400-8000 ft agl.
Smoke dispersal.....Good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....54-59.
24 hr trend......6 degrees warmer.
Max humidity........47-53 percent.
24 hr trend......40 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....North around 10 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 2400, then west.
Mixing Height.......2800-4800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor to fair.
.THURSDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....78-83.
24 hr trend......6 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....South around 10 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west.
Mixing Height.......800-2800 ft agl until 1200, then 5400-7400 ft
agl.
Smoke dispersal.....Poor until 1200, then fair to good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....59-64.
24 hr trend......2 degrees warmer.
Max humidity........40-46 percent.
24 hr trend......1 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northeast around 10 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 2400, then south.
Mixing Height.......2800-4800 ft agl until 2400, then 400 ft agl.
Smoke dispersal.....Poor.
.FRIDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....82-87.
24 hr trend......2 degrees warmer.
Min humidity........17-23 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then north
around 10 mph with higher gusts.
Ridge top winds.....West around 10 mph until 1200, then northwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then
northwest.
Mixing Height.......1000-3000 ft agl until 1200, then 5600-7600 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the lower 60s. Winds
generally less than 10 mph.
.SATURDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 57 to 62. Highs 85 to 90. Winds
generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 50s. Highs 84 to 89.
$$
WYZ276-202100-
Cody Foothills-
Including the cities of Clark, Cody, and Meeteetse
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....77-82.
24 hr trend......5 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......12 percent drier.
20-foot winds.......North winds around 10 mph with higher gusts.
Ridge top winds.....North around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......8000-9400 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....56-61.
24 hr trend......6 degrees warmer.
Max humidity........41-47 percent.
24 hr trend......35 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northeast winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 2400, then
southwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....North around 10 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 2400, then southwest.
Mixing Height.......3200-5200 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....82-87.
24 hr trend......5 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West around 10 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 7000-9000 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....60-65.
24 hr trend......3 degrees warmer.
Max humidity........40-46 percent.
24 hr trend......1 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Northeast winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 2400, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....East around 10 mph until 2400, then southwest.
Mixing Height.......2800-4800 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor to fair until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....82-87.
24 hr trend......1 degree warmer.
Min humidity........27-33 percent.
24 hr trend......6 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northeast around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West around 10 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 5200-7200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the lower 60s. Winds
generally less than 10 mph.
.SATURDAY...Mostly cloudy with chance of showers and
thunderstorms. Lows around 60. Highs in the mid 80s. Winds
generally less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the upper 50s. Highs in the lower 80s. West winds around
10 mph.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 50s. Highs around 80. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 50s. Highs around 80.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs in the lower 80s.
$$
WYZ287-202100-
Owl Creek Mountains-
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....73-78.
24 hr trend......6 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......13 percent drier.
20-foot winds.......Northeast winds around 10 mph and gusty.
Ridge top winds.....Northeast around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph.
Mixing Height.......7400-8800 ft agl.
Smoke dispersal.....Good to very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....56-61.
24 hr trend......5 degrees warmer.
Max humidity........35-41 percent.
24 hr trend......38 percent drier.
Humidity recovery...Poor.
20-foot winds.......Northeast winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 0300, then
southwest around 10 mph. Gusts up to 15 mph.
Ridge top winds.....Northeast around 10 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 2400, then
southwest.
Mixing Height.......2400-4400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......5 degrees warmer.
Min humidity........18-24 percent.
24 hr trend......6 percent drier.
20-foot winds.......Southwest winds around 10 mph until 1200, then
southeast until 1500, then upslope/upvalley 5-9
mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 15 mph until 1200, then
northeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 6400-8400 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......3 degrees warmer.
Max humidity........34-40 percent.
24 hr trend......Unchanged.
Humidity recovery...Poor.
20-foot winds.......Northeast winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....North around 10 mph until 2400, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 2400, then
southwest.
Mixing Height.......3000-5000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Poor to fair.
.FRIDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....79-84.
24 hr trend......1 degree warmer.
Min humidity........22-28 percent.
24 hr trend......4 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then
northeast around 10 mph. Gusts up to 15 mph.
Ridge top winds.....West around 10 mph until 1200, then northeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then northwest.
Mixing Height.......1400-3400 ft agl until 1200, then 5800-7800 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the lower 60s. Winds
generally less than 10 mph.
.SATURDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the lower 80s.
West winds around 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the upper 50s. Highs in the lower 80s. West winds around
10 mph.
.MONDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the upper 50s. Highs in the upper 70s. Winds generally
less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the upper 70s.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs around 80.
$$
WYZ286-202100-
Absaroka Mountains/North Shoshone NF-
Including the city of Pahaska
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....70-75.
24 hr trend......4 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......13 percent drier.
20-foot winds.......West winds around 15 mph with gusts to around
25 mph.
Ridge top winds.....West around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph.
Mixing Height.......7800-8600 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....50-55.
24 hr trend......5 degrees warmer.
Max humidity........51-57 percent.
24 hr trend......35 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph with gusts to
around 25 mph until 2100, then
downslope/downvalley 4-7 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......3400-5400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....74-79.
24 hr trend......4 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......2 percent drier.
20-foot winds.......West winds 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......2400-4400 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....53-58.
24 hr trend......4 degrees warmer.
Max humidity........49-55 percent.
24 hr trend......1 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 2400, then
west around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....74-79.
24 hr trend......1 degree warmer.
Min humidity........24-30 percent.
24 hr trend......2 percent wetter.
20-foot winds.......West winds around 10 mph until 1500, then
north. Gusts up to 20 mph.
Ridge top winds.....Northwest around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 6800-8800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Lows in the mid 50s. Winds
generally less than 10 mph.
.SATURDAY...Mostly cloudy with chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
West winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows around 50. Highs around 70. West winds 10 to
15 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with chance of showers
and thunderstorms. Lows in the upper 40s. Highs around 70.
$$
WYZ140-202100-
Yellowstone National Park-
Including the cities of Lake, Mammoth, and Old Faithful
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......4 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......13 percent drier.
20-foot winds.......West winds around 10 mph with higher gusts.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph.
Mixing Height.......7800-8600 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....45-50.
24 hr trend......5 degrees warmer.
Max humidity........60-66 percent.
24 hr trend......30 percent drier.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....West around 10 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 2400, then south.
Mixing Height.......3600-5600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....77-82.
24 hr trend......5 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor until 1200, then very good to excellent.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....48-53.
24 hr trend......4 degrees warmer.
Max humidity........60-66 percent.
24 hr trend......2 percent wetter.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....South around 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......3 degrees warmer.
Min humidity........26-32 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows in the lower 50s. Winds
generally less than 10 mph.
.SATURDAY...Not as warm. Mostly cloudy. Showers likely and chance
of thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 40s. Highs around 70. Southwest winds around
10 mph.
.MONDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. Winds
generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with chance of showers
and thunderstorms. Lows in the mid 40s. Highs around 70.
$$
WYZ415-202100-
North Zone Bridger Teton NF and Grand Teton NP-
Including the cities of Jackson and Moran
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......3 degrees warmer.
Min humidity........25-31 percent.
24 hr trend......14 percent drier.
20-foot winds.......West winds around 10 mph with higher gusts.
Ridge top winds.....West around 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph.
Mixing Height.......6800-7800 ft agl.
Smoke dispersal.....Good to very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....46-51.
24 hr trend......4 degrees warmer.
Max humidity........54-60 percent.
24 hr trend......32 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Downslope/downvalley 4-7 mph.
Ridge top winds.....West around 10 mph until 2400, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 2400, then southeast.
Mixing Height.......2600-4600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Poor to fair.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....76-81.
24 hr trend......5 degrees warmer.
Min humidity........25-31 percent.
24 hr trend......Unchanged.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1600-3600 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....49-54.
24 hr trend......4 degrees warmer.
Max humidity........59-65 percent.
24 hr trend......4 percent wetter.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southwest around 10 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 2400, then south.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......3 degrees warmer.
Min humidity........28-34 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 10 mph until 1200, then west.
Mixing Height.......2400-4400 ft agl until 1200, then 8600-10600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the lower 50s. Winds generally less than
10 mph.
.SATURDAY...Not as warm. Mostly cloudy. Chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 60s.
Winds generally less than 10 mph.
.TUESDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows in the mid 40s. Highs in the upper 60s.
.WEDNESDAY...Partly cloudy. Chance of showers and thunderstorms
in the afternoon. Highs around 70.
$$
WYZ416-202100-
West Wind River Mountains/East Zone Bridger Teton NF-
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....68-73.
24 hr trend......8 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......25 percent drier.
20-foot winds.......West winds around 15 mph with gusts to around
25 mph.
Ridge top winds.....West around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph.
Mixing Height.......7000-7800 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....46-51.
24 hr trend......5 degrees warmer.
Max humidity........48-54 percent.
24 hr trend......43 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph until 2400, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 2400, then north.
Mixing Height.......2800-4800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....72-77.
24 hr trend......4 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
10 to 15 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 1200, then around 20
mph.
Mixing Height.......2400-4400 ft agl until 1200, then 8000-10000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good to
excellent.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....50-55.
24 hr trend......4 degrees warmer.
Max humidity........51-57 percent.
24 hr trend......6 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......West winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northwest around 10 mph until 2400, then
northeast.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 2400, then
northeast.
Mixing Height.......3600-5600 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....75-80.
24 hr trend......3 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......2800-4800 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the lower 50s. Winds generally less than
10 mph.
.SATURDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the upper 40s. Highs in the upper 60s. Winds generally
less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 60s. Winds
generally less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the mid 40s. Highs in the mid 60s.
.WEDNESDAY...Partly cloudy. Chance of showers and thunderstorms
in the afternoon. Highs in the upper 60s.
$$
WYZ288-202100-
East Wind River Mountains/South Shoshone NF-
Including the cities of Dubois and South Pass
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......7 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......18 percent drier.
20-foot winds.......Northwest winds around 15 mph with gusts to
around 30 mph.
Ridge top winds.....Northwest around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph.
Mixing Height.......7800-8800 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....50-55.
24 hr trend......5 degrees warmer.
Max humidity........43-49 percent.
24 hr trend......41 percent drier.
Humidity recovery...Moderate.
20-foot winds.......West winds around 10 mph with gusts to around
25 mph until 0300, then downslope/downvalley
4-7 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......3200-5200 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......4 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......Unchanged.
20-foot winds.......West winds 10 to 15 mph with gusts to around 25
mph.
Ridge top winds.....West 15 to 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 15 to 20 mph.
Mixing Height.......2600-4600 ft agl until 1200, then 8600-10600 ft
agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....53-58.
24 hr trend......4 degrees warmer.
Max humidity........42-48 percent.
24 hr trend......2 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......West winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph until 0300, then
west around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......3800-5800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...20 percent.
Max temperature.....77-82.
24 hr trend......2 degrees warmer.
Min humidity........23-29 percent.
24 hr trend......2 percent wetter.
20-foot winds.......West winds around 10 mph until 0900, then
upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West around 10 mph until 1200, then northwest.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......3000-5000 ft agl until 1200, then 7000-9000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening. Lows in the upper 50s. Winds
generally less than 10 mph.
.SATURDAY...Mostly cloudy with chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 70s. West
winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows 49 to 54. Highs 69 to 74. West winds around
10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the lower 50s. Highs around 70.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs in the lower 70s.
$$
WYZ414-202100-
Salt and Wyoming Ranges/West Zone Bridger Teton NF-
Including the city of Afton
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....71-76.
24 hr trend......5 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......19 percent drier.
20-foot winds.......West winds around 15 mph with gusts to around
25 mph.
Ridge top winds.....West around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph.
Mixing Height.......7000-8200 ft agl.
Smoke dispersal.....Very good.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....47-52.
24 hr trend......5 degrees warmer.
Max humidity........55-61 percent.
24 hr trend......30 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph and gusty until
2100, then downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest around 15 mph until 2400, then south.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 2400, then south.
Mixing Height.......2800-4800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...10 percent.
Max temperature.....75-80.
24 hr trend......4 degrees warmer.
Min humidity........22-28 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west.
Mixing Height.......2200-4200 ft agl until 1200, then 8600-10600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....50-55.
24 hr trend......2 degrees warmer.
Max humidity........62-68 percent.
24 hr trend......9 percent wetter.
Humidity recovery...Good.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Southwest around 10 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 2400, then southeast.
Mixing Height.......3400-5400 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....79-84.
24 hr trend......3 degrees warmer.
Min humidity........21-27 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....South around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west.
Mixing Height.......2800-4800 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the mid 50s. Winds generally less than 10 mph.
.SATURDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 50s. Highs in the mid 70s. Winds generally less
than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
Winds generally less than 10 mph.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the lower 70s.
.WEDNESDAY...Partly cloudy. Slight chance of showers and
thunderstorms in the afternoon. Highs in the lower 70s.
$$
WYZ278-202100-
Upper Green River Basin/Rock Springs BLM-
Including the cities of Big Piney, Farson, and Pinedale
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....74-79.
24 hr trend......8 degrees warmer.
Min humidity........17-23 percent.
24 hr trend......25 percent drier.
20-foot winds.......Northwest winds around 15 mph with gusts to
around 30 mph.
Ridge top winds.....Northwest around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph.
Mixing Height.......8600-10000 ft agl.
Smoke dispersal.....Excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....48-53.
24 hr trend......3 degrees warmer.
Max humidity........50-56 percent.
24 hr trend......33 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 25 mph until 0300, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....North 10 to 15 mph.
Mixing Height.......3800-5800 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....77-82.
24 hr trend......3 degrees warmer.
Min humidity........18-24 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph with higher gusts.
Ridge top winds.....North around 10 mph until 1200, then southwest.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......800-2800 ft agl until 1200, then 7600-9600 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...0 percent.
Min temperature.....51-56.
24 hr trend......2 degrees warmer.
Max humidity........60-66 percent.
24 hr trend......11 percent wetter.
Humidity recovery...Good.
20-foot winds.......West winds around 10 mph and gusty until 2100,
then downslope/downvalley 4-7 mph.
Ridge top winds.....West around 10 mph until 2400, then north.
Chc of wetting rain.Zero percent.
Transport winds.....West around 10 mph until 2400, then north.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......3 degrees warmer.
Min humidity........20-26 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....North around 5 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 5 to 10 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 8200-10200 ft
agl.
Smoke dispersal.....Poor until 1200, then good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening. Lows in the mid 50s. Winds
generally less than 10 mph.
.SATURDAY...Mostly cloudy with chance of showers and
thunderstorms. Lows around 50. Highs in the upper 70s. Winds
generally less than 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the upper 70s.
Winds generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the upper 40s. Highs in the
upper 70s.
$$
WYZ277-202100-
Lincoln and Uinta Counties/Lower Elevations-
Including the cities of Evanston, Fort Bridger, and Kemmerer
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....77-82.
24 hr trend......5 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......14 percent drier.
20-foot winds.......Northwest winds around 15 mph with gusts to
around 30 mph.
Ridge top winds.....Northwest around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 25 mph.
Mixing Height.......8400-10000 ft agl.
Smoke dispersal.....Excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....52-57.
24 hr trend......5 degrees warmer.
Max humidity........45-51 percent.
24 hr trend......30 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 25 mph until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 15 mph until 2400, then
northeast.
Mixing Height.......3400-5400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Max temperature.....80-85.
24 hr trend......3 degrees warmer.
Min humidity........18-24 percent.
24 hr trend......2 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
southwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....Southeast around 10 mph until 1200, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southeast around 10 mph until 1200, then west.
Mixing Height.......1000-3000 ft agl until 1200, then 7800-9800 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.THURSDAY NIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....51-56.
24 hr trend......1 degree cooler.
Max humidity........54-60 percent.
24 hr trend......13 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......Southwest winds around 10 mph and gusty until
2100, then downslope/downvalley 4-7 mph.
Ridge top winds.....Southwest around 10 mph until 2400, then north.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 2400, then
northwest.
Mixing Height.......3000-5000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy.
Chance of thunder...0 percent.
Max temperature.....82-87.
24 hr trend......3 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......2 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....East around 5 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....South around 5 mph until 1200, then west.
Mixing Height.......2600-4600 ft agl until 1200, then 9400-11400 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy. Slight chance of showers and
thunderstorms in the evening, then slight chance of showers after
midnight. Lows in the mid 50s. Winds generally less than 10 mph.
.SATURDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows in the lower 50s. Highs around 80. Winds generally less than
10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs in the
upper 70s. Winds generally less than 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows around 50. Highs in the upper
70s.
$$
WYZ279-202100-
Sweetwater County/Rock Springs BLM/Flaming Gorge NRA-
Including the cities of Green River, Rock Springs, and Wamsutter
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....78-83.
24 hr trend......7 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......19 percent drier.
20-foot winds.......Northwest winds around 20 mph with gusts to
around 30 mph.
Ridge top winds.....Northwest around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 25 mph.
Mixing Height.......10200-10800 ft agl.
Smoke dispersal.....Excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....54-59.
24 hr trend......3 degrees warmer.
Max humidity........46-52 percent.
24 hr trend......37 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds 10 to 15 mph with gusts to
around 25 mph until 2400, then
downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest 10 to 15 mph.
Mixing Height.......4600-6600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good to very good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny. Slight chance of showers and
thunderstorms late in the afternoon. Chance of
precipitation 20 percent.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......2 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......1 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west
around 10 mph with gusts to around 25 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West 10 to 15 mph.
Mixing Height.......1200-3200 ft agl until 1200, then 8000-10000 ft
agl.
Smoke dispersal.....Poor until 1200, then good to very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy. Slight chance of showers and
thunderstorms early in the evening. Chance of
precipitation 20 percent.
Chance of thunder...10 percent.
Min temperature.....56-61.
24 hr trend......1 degree warmer.
Max humidity........56-62 percent.
24 hr trend......6 percent wetter.
Humidity recovery...Moderate.
20-foot winds.......West winds around 10 mph with gusts to around
25 mph until 2100, then downslope/downvalley
4-7 mph.
Ridge top winds.....Southwest 5 to 10 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 15 mph until 2400, then southwest
around 5 mph.
Mixing Height.......4000-6000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Max temperature.....83-88.
24 hr trend......4 degrees warmer.
Min humidity........24-30 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph.
Ridge top winds.....Southwest around 5 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then
northwest.
Mixing Height.......2600-4600 ft agl until 1200, then 9600-11600 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then good to very
good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Mostly cloudy. Lows in the upper 50s. Winds
generally less than 10 mph.
.SATURDAY...Mostly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the mid 50s. Highs in the mid
80s. Southwest winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows 51 to 56. Highs in the lower 80s.
Southwest winds around 10 mph.
.TUESDAY THROUGH WEDNESDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the lower 50s. Highs in the
lower 80s.
$$
WYZ289-202100-
Granite/Green/Ferris/Rattlesnake Mountains-
Including the city of Jeffrey City
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....76-81.
24 hr trend......8 degrees warmer.
Min humidity........17-23 percent.
24 hr trend......18 percent drier.
20-foot winds.......Northwest winds around 15 mph with gusts to
around 30 mph.
Ridge top winds.....Northwest around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 20 mph.
Mixing Height.......8800-10000 ft agl.
Smoke dispersal.....Very good to excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....55-60.
24 hr trend......4 degrees warmer.
Max humidity........42-48 percent.
24 hr trend......33 percent drier.
Humidity recovery...Moderate.
20-foot winds.......North winds around 10 mph with gusts to around
25 mph until 2100, then downslope/downvalley
4-7 mph.
Ridge top winds.....North 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast 10 to 15 mph.
Mixing Height.......3600-5600 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.THURSDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......4 degrees warmer.
Min humidity........14-20 percent.
24 hr trend......3 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....West 10 to 15 mph.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......1400-3400 ft agl until 1200, then 8400-10400 ft
agl.
Smoke dispersal.....Poor until 1200, then very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....58-63.
24 hr trend......3 degrees warmer.
Max humidity........41-47 percent.
24 hr trend......1 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph and gusty until
2100, then downslope/downvalley 4-7 mph.
Ridge top winds.....Northwest around 10 mph until 2400, then
southwest.
Chc of wetting rain.Zero percent.
Transport winds.....Northwest around 10 mph until 2400, then south.
Mixing Height.......5000-7000 ft agl until 2400, then 400-600 ft
agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny.
Chance of thunder...0 percent.
Max temperature.....84-89.
24 hr trend......3 degrees warmer.
Min humidity........15-21 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph with gusts to around 25
mph.
Ridge top winds.....Southwest around 10 mph until 1200, then
northwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then
northwest.
Mixing Height.......3000-5000 ft agl until 1200, then 10400-12400
ft agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows around 60. Winds generally
less than 10 mph.
.SATURDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
Southwest winds around 10 mph.
.SUNDAY THROUGH MONDAY...Partly cloudy with slight chance of
showers and thunderstorms. Lows in the mid 50s. Highs 80 to 85.
Southwest winds around 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s.
.WEDNESDAY...Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon. Highs in the lower 80s.
$$
WYZ300-202100-
Casper Mountain-
1257 PM MDT Wed Aug 19 2026
.THIS AFTERNOON...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....75-80.
24 hr trend......7 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......18 percent drier.
20-foot winds.......Northwest winds around 15 mph with higher
gusts.
Ridge top winds.....Northwest around 20 mph.
Chc of wetting rain.Zero percent.
Transport winds.....West around 20 mph.
Mixing Height.......8800-9800 ft agl.
Smoke dispersal.....Very good to excellent.
.TONIGHT...
Sky/weather.........Mostly clear.
Chance of thunder...0 percent.
Min temperature.....55-60.
24 hr trend......5 degrees warmer.
Max humidity........48-54 percent.
24 hr trend......29 percent drier.
Humidity recovery...Moderate.
20-foot winds.......Northwest winds around 10 mph until 2100, then
downslope/downvalley 4-7 mph. Gusts up to 20
mph.
Ridge top winds.....North around 10 mph until 2400, then southeast.
Chc of wetting rain.Zero percent.
Transport winds.....North around 10 mph until 2400, then southeast.
Mixing Height.......3400-5400 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Fair to good until 2400, then poor.
.THURSDAY...
Sky/weather.........Sunny.
Chance of thunder...0 percent.
Max temperature.....80-85.
24 hr trend......4 degrees warmer.
Min humidity........16-22 percent.
24 hr trend......4 percent drier.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west
around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then west.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then west
around 20 mph.
Mixing Height.......2200-4200 ft agl until 1200, then 8000-10000 ft
agl.
Smoke dispersal.....Poor to fair until 1200, then very good.
.THURSDAY NIGHT...
Sky/weather.........Partly cloudy.
Chance of thunder...0 percent.
Min temperature.....57-62.
24 hr trend......2 degrees warmer.
Max humidity........36-42 percent.
24 hr trend......11 percent drier.
Humidity recovery...Poor.
20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15
mph.
Ridge top winds.....Northeast around 10 mph until 2400, then
southeast.
Chc of wetting rain.Zero percent.
Transport winds.....Northeast around 10 mph until 2400, then south.
Mixing Height.......4200-6200 ft agl until 2400, then 600 ft agl.
Smoke dispersal.....Good until 2400, then poor.
.FRIDAY...
Sky/weather.........Mostly sunny.
Chance of thunder...0 percent.
Max temperature.....83-88.
24 hr trend......4 degrees warmer.
Min humidity........19-25 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then
northwest around 10 mph. Gusts up to 20 mph.
Ridge top winds.....Southwest around 10 mph until 1200, then
northwest.
Chc of wetting rain.Zero percent.
Transport winds.....Southwest around 10 mph until 1200, then
northwest.
Mixing Height.......3200-5200 ft agl until 1200, then 10600-12600
ft agl.
Smoke dispersal.....Fair to good until 1200, then excellent.
.Forecast days 3 through 7......
.FRIDAY NIGHT...Partly cloudy. Lows around 60. Winds generally
less than 10 mph.
.SATURDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows around 60. Highs in the lower 80s. South winds around
10 mph.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 50s. Highs around 80.
Southwest winds around 10 mph.
.MONDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 50s. Highs in the upper 70s.
Winds generally less than 10 mph.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the upper 70s.
.WEDNESDAY...Partly cloudy. Highs in the upper 70s.
$$